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Abstract
Secure retention of CO 2 in geological reservoirs is essential for effective storage. Solubility trapping, the dissolution of CO 2 into formation water, is a major sink on geological timescales in natural CO 2 reservoirs. Observations during CO 2 injection, combined with models of CO 2 reservoirs, indicate the immediate onset of solubility trapping. There is uncertainty regarding the evolution of dissolution rates between the observable engineered timescale of years and decades, and the >10 kyr state represented by natural CO 2 reservoirs. A small number of studies have constrained dissolution rates within natural analogues. The studies show that solubility trapping is the principal storage mechanism after structural trapping, removing 10– 50% of CO 2 across whole reservoirs. Natural analogues, engineered reservoirs and model studies produce a wide range of estimates on the fraction of CO 2 dissolved and the dissolution rate. Analogue and engineered reservoirs do not show the high fractions of dissolved CO 2 seen in several models. Evidence from natural analogues supports a model of most dissolution occurring during emplacement and migration, before the establishment of a stable gas–water contact. A rapid decline in CO 2 dissolution rate over time suggests that analogue reservoirs are in dissolution equilibrium for most of the CO 2 residence time.
Original language | English |
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Article number | petgeo2020–120 |
Pages (from-to) | petgeo2020-120 |
Number of pages | 10 |
Journal | Petroleum Geoscience |
Volume | 27 |
Issue number | 4 |
Early online date | 26 Jul 2021 |
DOIs | |
Publication status | Published - 30 Nov 2021 |
Keywords
- Atlantic Ocean
- carbon dioxide
- carbon sequestration
- Cenozoic
- gas-water interface
- injection
- migration
- Mississippi
- natural analogs
- Neogene
- New Mexico
- North Atlantic
- North Sea
- quantitative analysis
- rates
- resevoir properties
- residence time
- solubility
- solution
- tertiary
- underground installations
- underground storage
- United States
- Bravo Dome
- Sleipner Field
- Jackson Dome
- Utsira Formation
Fingerprint
Dive into the research topics of 'Quantification of solubility trapping in natural and engineered CO2 reservoirs'. Together they form a unique fingerprint.Projects
- 2 Finished
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The role of CCS in industry clusters in delivering value to the political economy
Turner, K. (Principal Investigator) & Race, J. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/06/19 → 31/01/20
Project: Research
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UK Carbon Capture and Storage Research Centre 2017 (UKCCSRC 2017)
Race, J. (Principal Investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/04/17 → 31/12/22
Project: Research